// C++ informative line for the emacs editor: -*- C++ -*-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
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 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef __H5Object_H
#define __H5Object_H

//#include "H5Location.h"
//#include "H5Classes.h"		// constains forward class declarations

// H5Object is a baseclass.  It has these subclasses:
// Group, DataSet, and DataType.
// DataType, in turn, has several specific datatypes as subclasses.
// Modification:
//	Sept 18, 2012: Added class H5Location in between IdComponent and
//		H5Object.  An H5File now inherits from H5Location.  All HDF5
//		wrappers in H5Object are moved up to H5Location.  H5Object
//		is left mostly empty for future wrappers that are only for
//		group, dataset, and named datatype.  Note that the reason for
//		adding H5Location instead of simply moving H5File to be under
//		H5Object is H5File is not an HDF5 object, and renaming H5Object
//		to H5Location will risk breaking user applications.
//		-BMR
//	Apr 2, 2014: Added wrapper getObjName for H5Iget_name 
#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif

class H5_DLLCPP H5Object;

// Define the operator function pointer for H5Aiterate().
typedef void (*attr_operator_t)( H5Object& loc/*in*/,
                                 const H5std_string attr_name/*in*/,
                                 void *operator_data/*in,out*/);

// User data for attribute iteration
class UserData4Aiterate {
    public:
	attr_operator_t op;
	void* opData;
	H5Object* location;
};

/*! \class H5Object
    \brief Class H5Object is a bridge between H5Location and DataSet, DataType,
     and Group.

    All the wrappers in H5Object were moved to H5Location.
*/
class H5_DLLCPP H5Object : public H5Location {
   public:
// Rearranging classes (HDFFV-9920) moved H5A wrappers back into H5Object.
// That way, C functions that takes attribute id can be in
// H5Location and those that cannot take attribute id can be in H5Object.

	// Creates an attribute for the specified object
	// PropList is currently not used, so always be default.
	Attribute createAttribute( const char* name, const DataType& type, const DataSpace& space, const PropList& create_plist = PropList::DEFAULT ) const;
	Attribute createAttribute( const H5std_string& name, const DataType& type, const DataSpace& space, const PropList& create_plist = PropList::DEFAULT ) const;

	// Given its name, opens the attribute that belongs to an object at
	// this location.
	Attribute openAttribute( const char* name ) const;
	Attribute openAttribute( const H5std_string& name ) const;

	// Given its index, opens the attribute that belongs to an object at
	// this location.
	Attribute openAttribute( const unsigned int idx ) const;

	// Iterate user's function over the attributes of this object.
	int iterateAttrs(attr_operator_t user_op, unsigned* idx = NULL, void* op_data = NULL);

	// Determines the number of attributes belong to this object.
	int getNumAttrs() const;

	// Checks whether the named attribute exists for this object.
	bool attrExists(const char* name) const;
	bool attrExists(const H5std_string& name) const;

	// Renames the named attribute to a new name.
	void renameAttr(const char* oldname, const char* newname) const;
	void renameAttr(const H5std_string& oldname, const H5std_string& newname) const;

	// Removes the named attribute from this object.
	void removeAttr(const char* name) const;
	void removeAttr(const H5std_string& name) const;

	// Returns an identifier.
	virtual hid_t getId() const = 0;

#ifndef DOXYGEN_SHOULD_SKIP_THIS
	// Gets the name of this HDF5 object, i.e., Group, DataSet, or
	// DataType.  These should have const but are retiring anyway.
	ssize_t getObjName(char *obj_name, size_t buf_size = 0) const;
	ssize_t getObjName(H5std_string& obj_name, size_t len = 0) const;
	H5std_string getObjName() const;

   protected:
	// Default constructor
	H5Object();

        // *** Deprecation warning ***
        // The following two constructors are no longer appropriate after the
        // data member "id" had been moved to the sub-classes.
        // The copy constructor is a noop and is removed in 1.8.15 and the
        // other will be removed from 1.10 release, and then from 1.8 if its
        // removal does not raise any problems in two 1.10 releases.

	// Creates a copy of an existing object giving the object id
	H5Object( const hid_t object_id );

	// Copy constructor: makes copy of an H5Object object.
	// H5Object(const H5Object& original);

        // Sets the identifier of this object to a new value. - this one
        // doesn't increment reference count
        virtual void p_setId(const hid_t new_id) = 0;

	// Noop destructor.
	virtual ~H5Object();

#endif // DOXYGEN_SHOULD_SKIP_THIS

}; /* end class H5Object */

#ifndef H5_NO_NAMESPACE
}
#endif
#endif // __H5Object_H
